For links with paranthesis you will need to write as [[Wikipedia:Fork_(software_development)]], or quoted, as Wikipedia:'Fork_(software_development)' as we assume that the closing paranthesis is not part of the link. For example, Wikipedia:Fork_(software_development) .

InterwikiPlugin Settings

You can override the default settings using preferences. These preferences can be set in your SitePreferences, or in WebPreferences, or in individual topics.